Dr Clement Uguna

Dr Clement Uguna

Research Scientist

Location: Keyworth

E-mail Dr Clement Uguna

Biography

  •  2014 – ongoing : Research Fellow- Petroleum Geochemist, British Geological Survey Keyworth
  •  2007 –2014 : Research Fellow- Petroleum Geochemist, University of Nottingham
  •  2004 –2007 : PhD- University of Nottingham, Petroleum Geochemistry
  •  2002 –2003 : MRes- University of Nottingham, Petroleum Geochemistry

Research interests

  • Petroleum Geochemistry
  • Environmental Geochemistry
  • Conversion of Biomass and Coal to liquid hydrocarbon

Current projects and collaboration

  • Investigating the mechanisms of shale gas formation and how gas is stored within shale rocks in unconventional reservoirs. This is by using high water pressure pyrolysis technique to simulate shale gas generation as a function of temperature and pressure over geological time scales. This is in collaboration with the University of Nottingham
  • Coversion of biomass to residue with properties of coking coal using hydrous pyrolysis technique, In collaboration with the University of Nottingham

Professional association

  • EAOG- European Association of Organic Geochemists

Key papers

Uguna, C.N., Carr, A.D., Snape, C.E., Meredith, W., Scotchman, I.C., Murray, A., Vane, C.H., 2016. Impact of high water pressure on oil generation and maturation in Kimmeridge Clay and Monterey source rocks: Implication for petroleum retention and gas generation in shale gas systems. Journal of Marine and Petroleum Geology 73, 72-85.

Uguna, C.N., Carr, A. D., Snape, C.E. and Meredith, W., 2016. Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900 bar Organic Geochemistry. 97, 61-73.

Xie, L., Sun, Y., Uguna, C, N., Li, Y., Snape, C.E., Meredith, W. 2016. Thermal cracking of oil under water pressure up to 900 bar at high thermal maturities 1. Gas compositions and carbon isotopes. Energy & Fuels. 30, 2617-2627.

Castro-Díaz, M., Uguna, C.N., Cheeseman, B., Barker, J., Snape, C.E. 2016. Investigation of the fluid behavior of asphaltenes and toluene insolubles by high-temperature proton nuclear magnetic resonance and rheometry and their application in visbreaking. Energy & Fuels. 30, 2012-2020.

Isa, K. M., Snape, C. E., Uguna C., Meredith, W., DENG, H., 2016. Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400°C: Journal of Analytical and Applied Pyrolysis Journal of Analytical and Applied Pyrolysis. 119, 180-188.

UGUNA, C,N, CARR, A,D, SNAPE, C,E, and MEREDITH, W. 2015. High pressure water pyrolysis of coal to evaluate the role of pressure on hydrocarbon generation and source rock maturation at high maturities under geological conditions. Organic Geochemistry, 78, 44-51

CARR, A,D, and UGUNA, C,N. 2015. Some thoughts on the influence of pressure and thermal history assumptions on petroleum systems modelling. Journal of Petroleum Geology, 38, 459-465

UGUNA C, N, AZRI M, H, SNAPE C, E, MEREDITH, W, and CARR A, D. 2013. A hydrous pyrolysis study to ascertain how gas yields and the extent of maturation for a partially matured source rock and bitumen in isolation compared to their whole source rock. Journal of Analytical and Applied Pyrolysis, 103, 268-277

UGUNA, C, N, CARR, A, D, SNAPE, C, E, MEREDITH, W, and CASTRO-DÍAZ, M. 2012. A laboratory pyrolysis study to investigate the effect of water pressure on hydrocarbon generation and maturation of coals in geological basins. Organic Geochemistry, 52, 103-113

UGUNA, C, N, SNAPE, C, E, MEREDITH, W, CARR, A, D, SCOTCHMAN, I, C, and DAVIS, R, C. 2012. Retardation of hydrocarbon generation and maturation by water pressure in geologic basins: An experimental investigation. In: PETERS, K, E, CURRY, D, J, and KACEWICZ, M, eds., Basin Modeling: New Horizons in Research and Applications: AAPG Hedberg Series 4, 19-37

SONIBARE, O, O, SNAPE, C, E, MEREDITH, W, UGUNA, C, and LOVE, G, D. 2009. Geochemical characterisation of heavily biodegraded oil sand bitumens by catalytic hydropyrolysis. Journal of Analytical and Applied Pyrolysis, 86, 135-140

CARR, A, D, SNAPE, C, E, MEREDITH, W, UGUNA, C, SCOTCHMAN, I, C, and DAVIS, R, C. 2009. The effect of water pressure on hydrocarbon generation reactions: some inferences from laboratory experiments. Petroleum Geoscience, 15(1), 17-26

MEREDITH, W, SNAPE, C, E, UGUNA, C, and LOVE, G, D. 2008. Maximising the yield of bound aliphatic biomarkers via a convenient two-stage hydropyrolysis procedure. In: LIANG, D, WANG, D and LI, Z, eds., Petroleum Geochemistry and Exploration in the Afro-Asian Region. Taylor and Francis, 145-152